/**
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jivesoftware.smackx.bytestreams.ibb;

import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.filter.AndFilter;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.filter.PacketTypeFilter;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smackx.bytestreams.ibb.packet.Data;

/**
 * DataListener handles all In-Band Bytestream IQ stanzas containing a data
 * packet extension that don't belong to an existing session.
 * <p>
 * If a data packet is received it looks if a stored In-Band Bytestream session
 * exists. If no session with the given session ID exists an
 * &lt;item-not-found/&gt; error is returned to the sender.
 * <p>
 * Data packets belonging to a running In-Band Bytestream session are processed
 * by more specific listeners registered when an {@link InBandBytestreamSession}
 * is created.
 * 
 * @author Henning Staib
 */
class DataListener implements PacketListener {

	/* manager containing the listeners and the XMPP connection */
	private final InBandBytestreamManager manager;

	/* packet filter for all In-Band Bytestream data packets */
	private final PacketFilter dataFilter = new AndFilter(new PacketTypeFilter(
			Data.class));

	/**
	 * Constructor.
	 * 
	 * @param manager
	 *            the In-Band Bytestream manager
	 */
	public DataListener(InBandBytestreamManager manager) {
		this.manager = manager;
	}

	public void processPacket(Packet packet) {
		Data data = (Data) packet;
		InBandBytestreamSession ibbSession = this.manager.getSessions().get(
				data.getDataPacketExtension().getSessionID());
		if (ibbSession == null) {
			this.manager.replyItemNotFoundPacket(data);
		}
	}

	/**
	 * Returns the packet filter for In-Band Bytestream data packets.
	 * 
	 * @return the packet filter for In-Band Bytestream data packets
	 */
	protected PacketFilter getFilter() {
		return this.dataFilter;
	}

}
